402121111442 has 8 divisors (see below), whose sum is σ = 638662941756. Its totient is φ = 189233464192.

The previous prime is 402121111349. The next prime is 402121111451. The reversal of 402121111442 is 244111121204.

It can be written as a sum of positive squares in 2 ways, for example, as 378743007241 + 23378104201 = 615421^2 + 152899^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5913545723 + ... + 5913545790.

Almost surely, 2^402121111442 is an apocalyptic number.

402121111442 is a deficient number, since it is larger than the sum of its proper divisors (236541830314).

402121111442 is a wasteful number, since it uses less digits than its factorization.

402121111442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11827091532.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 402121111442 its reverse (244111121204), we get a palindrome (646232232646).

The spelling of 402121111442 in words is "four hundred two billion, one hundred twenty-one million, one hundred eleven thousand, four hundred forty-two".